KR101811582B1 - Freeze protection type adhesion inhibitor for asphalt mixture and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an asphalt mixture attachment prevention agent, and to a manufacturing thereof. More specifically, the asphalt mixture attachment prevention agent, on the basis of 100 parts by weight of vegetable fat having an acid value of 0.6 or less and a specific gravity ranging from 0.90 to 0.95, comprises: 300 to 1400 parts by weight of water; 0.3 to 5 parts by weight of an emulsifier; 1 to 5 parts by weight of a pH adjusting agent; 0.2 to 5 parts by weight of a viscosity adjusting agent which changes viscosity according to pH; 0.5 to 2 parts by weight of an antiseptic; and 100 to 500 parts by weight of a freezing point adjusting agent capable of lowering the freezing point of the water. The asphalt mixture attachment prevention agent is not frozen even at a sub-zero temperature, and thus can be used in winter.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an antifreezing antifouling adhesion preventive agent,

The present invention relates to an asphalt mixture adhesion preventing agent and a method for producing the same, and more particularly, to an asphalt mixture preventive agent for preventing adhesion of an asphalt mixture to a surface of an asphalt mixture manufacturing facility, Free asphalt mixture adhesion preventive agent and a process for producing the same.

The asphalt mixture used for road pavement is mixed with asphalt as an adhesive in a heated liquid phase in the aggregate, and then cooled and hardened to have adhesiveness.

Manufacture of asphalt mixture In order to prevent deterioration of workability at the site of road pavement where the plant or asphalt mixture is used for construction, it is necessary to use a manufacturing factory, a silo for storage, a transfer dump truck, a voltage roller construction tool at the time of construction, It is important to prevent adhesion and accumulation of the asphalt mixture on the back surface.

In order to prevent adhesion and deposition of the asphalt mixture as described above, Korean Patent No. 1247782 entitled " Emulsion Asphalt for Preventing Adhesion and Composition thereof ", a silicon-based compound and an inorganic compound are mixed in an amount of 20: 80 to 80: Or a mixture of petroleum and an inorganic compound in a ratio of 20:80 to 80:20 parts by weight. The inorganic compound may be selected from the group consisting of silica, silicate mineral, zeolite, calcium carbonate, titanium oxide, aluminum oxide, zinc oxide, magnesium oxide Or a mixture of two or more thereof, and the silicon-based compound is a mixture of any one of colloidal silica and organopolysiloxane, or a mixture of the two, and the petroleum is any one of kerosene, heavy oil and light oil Or a mixture of two or more thereof.

However, since the antifouling agent used here is excellent in preventing adhesion of the asphalt mixture, the asphalt mixture is used in a spraying manner, so that the environmental load such as low toxicity and biodegradability is small Is required.

On the other hand, Korean Patent No. 1635457 entitled " Asphalt Mix Adhering Agent and Method for Manufacturing the Same ", 5.0 to 30.0% by weight of vegetable fat as an anti- 0.1 to 1.0% by weight of an emulsifier; 0.1 to 0.3% by weight of a viscosity modifier which changes viscosity according to pH; 0.01 to 0.3% by weight of a pH adjusting agent; 0.05 to 0.2% by weight of an antiseptic; And 68.2 to 94.74% by weight of water.

However, the antifouling agent used here also has an excellent ability to prevent adhesion of asphalt mixture. However, since the main component is water, when the temperature of the winter season is lowered, the antifouling agent itself can not be used due to the characteristics of water having a low freezing point, An asphalt mixture adhesion preventive agent which is not frozen even at a low temperature is required.

In some cases, vegetable fats such as soybean oil extracted from soybeans and the like are used as anti-adhesion agents. However, vegetable fats also have a problem of dissolving asphalt components in the asphalt mixture as well as mineral oils including kerosene, heavy oil and light oil. It is known that when the asphalt component is eluted from the asphalt mixture, the bonding force of the aggregate is weakened in the mixture, which causes the failure of the construction such as the aggregate is desorbed during the running of the vehicle.

Therefore, there is a need for an improved asphalt mixture adhesion preventive agent that can be used in an environment with low environmental load while having low environmental load, and at the same time does not elute the asphalt component from the asphalt mixture.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an antifreeze antifreeze agent for asphalt mixture which does not dissolve an asphalt component in an asphalt mixture but is freeze- .

Another object of the present invention is to provide an environment-friendly asphalt mixture adhesion preventive agent which is low toxicity and is environmentally friendly.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical subjects which are not mentioned can be clearly understood by those skilled in the art from the description of the present invention .

According to the present invention, there is provided a vegetable oil composition comprising 100 parts by weight of vegetable fat having an acid value of 0.6 or less and a specific gravity of 0.90 to 0.95, 300 to 1400 parts by weight of water, 0.3 to 5 parts by weight of an emulsifier; 1 to 5 parts by weight of a pH adjusting agent; 0.2 to 5 parts by weight of a viscosity modifier which changes viscosity according to pH; 0.5 to 2 parts by weight of an antiseptic; 100 to 500 parts by weight of a freezing point controlling agent capable of lowering the freezing point of the water; The viscosity modifier may be a water-soluble copolymer or a homopolymer cross-linked with an acrylic acid and a polyalkenyl polyether. Wherein the freezing point controlling agent is selected from the group consisting of propylene glycol or ethylene glycol, and ethyl alcohol in a ratio ranging from 1: 1 to 1: 2. Type asphalt mixture.

In the present invention, the vegetable fat may be any one of vegetable refined oil, vegetable fatty acid, and vegetable fatty acid ester.

In the present invention, the emulsifier may be at least one selected from the group consisting of alkyl sulfates, alkyl ether sulfates, alkyl benzene sulfonates, alpha olefin sulfonates, alkyl sulfates It is preferably one selected from the group consisting of sulfosuccinate, alkyl phosphate, and isothiocyanate.

In the present invention, the pH adjusting agent is preferably one selected from the group consisting of sodium hydroxide, potassium hydroxide, arginine, and triethanolamine.

In the present invention, the preservative is preferably one selected from the group consisting of Benzoic Acid, Benzoate, Sorbic Acid, Sorbate and Paraben.

According to another aspect of the present invention, there is provided a method for producing a mixture, comprising: preparing a mixture by dispersing a viscosity controlling agent in vegetable fat; An emulsifying water producing step of emulsifying the emulsifying agent and the preservative in water to produce emulsified water; An emulsifying step of adding and mixing the mixture to the emulsified water to emulsify the vegetable fat in the emulsified water and to disperse the viscosity regulator dispersed in the vegetable fat to produce an emulsion; A mixing step of mixing a freezing point controlling agent into the emulsion; And adjusting the viscosity by mixing the pH adjusting agent after the mixing step; Of the asphalt mixture.

The anti-adhesion agent for asphalt mixture according to the present invention has an excellent antifouling performance and can be used without being affected by the surrounding environment because it does not freeze even in the winter when the temperature is low.

In addition, the antifouling agent for asphalt mixture according to the present invention can prevent aging of rubber to be contacted, and can also reduce environmental pollution and improve working environment by using environmentally friendly, low-toxicity material.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method for manufacturing an anti-freezing asphalt mixture according to an embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present description and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor should properly interpret the concepts of the terms in order to describe their invention in the best way. It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise.

The anti-freezing type asphalt mixture preventing agent is used to prevent the asphalt mixture from adhering to the surface of the asphalt mixture manufacturing equipment, the road paving equipment or the use equipment, and to increase the ease of use without freezing in low temperature environment such as winter 300 to 1400 parts by weight of water, 0.3 to 5 parts by weight of an emulsifier, 1 to 5 parts by weight of a pH adjusting agent, 100 parts by weight of a vegetable fat having an acid value of 0.6 or less and a specific gravity of 0.90 to 0.95, , 0.5 to 2 parts by weight of a preservative, and 100 to 500 parts by weight of a freezing point controlling agent capable of lowering the freezing point of the water, and the respective components are as follows.

Vegetable fat

Vegetable fat refers to the oil contained in the fruits and seeds of plants, and the constituent fatty acids are characterized by saturated fatty acids being present in the form of liquid at room temperature.

The vegetable fats used in the present invention include plant-derived refined oils, vegetable fatty acids and vegetable fatty acid esters extracted from plants, and prevent the asphalt mixture from adhering to production facilities, transportation trucks, construction equipment or construction tools in the emulsified state in water .

More specifically, the vegetable fat used in the present invention is mainly composed of purified soybean oil extracted from soybean, corn oil extracted from corn, canola oil extracted from rape seed, sunflower seed oil extracted from sunflower seed, cottonseed oil extracted from cottonseed, grape seed oil extracted from grape seed, Safflower seed oil extracted from safflower seed, olive oil extracted from olive oil, etc., and has an acid value of 0.6 or less and a specific gravity of 0.90 to 0.95.

The number of mg of potassium hydroxide necessary to neutralize the free fatty acid contained in 1 g of fat is a numerical value representing the amount of free fatty acid contained in the acid-blasted oil. Since the fat is hydrolyzed to cause free fatty acid formation due to storage, rancidity, or the like, the acid value is generally a measure of quality.

Viscosity modifier

Viscosity modifiers are components for increasing or decreasing the viscosity of the final product and refer to configurations that have a significant effect on the stability, texture and usability of the product. The viscosity adjusting agent may be divided into a viscosity increasing agent and a viscosity reducing agent. However, the present invention does not limit the present invention but refers to a composition capable of controlling the viscosity of the anti-freezing asphalt mixture adhesion preventive agent.

The viscosity modifier of the present invention is a water-soluble copolymer which changes the viscosity according to the pH of an aqueous solution. As an antifouling agent, an asphalt mixture adhesion preventive agent is uniformly applied to the asphalt mixture manufacturing facility, the transport dump truck or the construction equipment surface to a constant thickness The viscosity of the solution is controlled so that the viscosity can be obtained.

More specifically, the viscosity modifier is a high molecular weight homopolymer or copolymer obtained by cross-linked bonding of acrylic acid and polyalkenyl polyether, , When immersed in water, is fixed with a hydrogen bond, and the pH shows an acidity of 2.7 to 3.5 (at 0.5 wt% dispersion).

1% by weight of the water-soluble copolymer is dissolved in water, and the viscosity of the aqueous solution is adjusted to 40,000 mPas to 80,000 mPas when the pH of the aqueous solution is adjusted to 5.8 to 6.3 using sodium hydroxide as a pH adjusting agent.

Preferably, the viscosity modifier composed of the water-soluble copolymer in the anti-freeze type asphalt mixture adhesion preventive agent according to the present invention may be included in the range of 0.2 to 5 parts by weight based on 100 parts by weight of the vegetable fat.

When the content of the water-soluble copolymer is less than 0.2 part by weight, the effect of increasing the viscosity of the anti-adhesion agent is small, so that the desired viscosity can not be obtained in the present invention. Thus, when the anti- On the contrary, when the content of the water-soluble copolymer exceeds 5 parts by weight, the viscosity of the anti-adhesion agent is excessively increased, which makes it in a creamy state or a gel state and can not be sprayed with a spray.

Emulsifier

An emulsifier is a mixture of two kinds of liquids (usually water and an organic liquid such as oil that does not mix with it) that need to be added to form a stable emulsion. In this case, the third substance is added to the emulsifier do.

What is effective as an emulsifier generally corresponds to a so-called surface active substance which contains both a hydrophilic group and a lipophilic group in the molecule and is capable of forming an adsorption layer at the interface between water and oil.

Accordingly, the emulsifier of the present invention is an anionic surfactant that emulsifies vegetable fat into water to maintain a stabilized emulsified state, and is used as an alkyl sulfate (alkyl sulfate), an alkyl ether sulfate (Alkyl Ether Sulfate), an alkyl benzene sulfonate Benzene sulfonate, alphaolefin sulfonate, alkyl sulfosuccinate, alkyl phosphate, and isothiocyanate. [0029] The term &

In some cases, cationic surfactants such as amine, quaternary ammonium salt, pyridinium or ethylene oxide, diethanolamine, sorbitol, Sorbitol, and glycerine may be used. However, it is preferable to use anionic surfactants as described above in order to obtain a stable emulsified state in water using vegetable fat.

Such a water-soluble emulsifier may be contained in an amount of 0.3 to 5 parts by weight based on 100 parts by weight of the vegetable fat in the antifreezing agent for preventing adhesion of the asphalt mixture according to the present invention.

If the amount of the emulsifier is less than 0.3 part by weight, the stable emulsification state can not be maintained. On the other hand, if the amount of the emulsifying agent exceeds 5 parts by weight, the emulsion becomes in the form of water-in-oil type or water in oil type and is included in the asphalt mixture The asphalt is dissolved.

antiseptic

It is a preservative to prevent the vegetable organic material from decaying due to the action of microorganisms, and the preservative is added to preserve it for the purpose of preservation. It is a kind of antiseptic preservative that inhibits the growth of bacteria.

Although it is different from disinfectant or disinfectant in that it does not kill microorganisms, it is actually difficult to differentiate. Generally speaking, preservatives are added to prevent the deterioration of food, cosmetics and pharmaceuticals and to maintain their purity while they are being used or preserved.

Therefore, the preservative of the present invention is intended to prevent the vegetable fat constituting the main constituent of unsaturated fatty acid from being oxidized by reaction with fungi, bacteria, bacteria and the like by being proliferated and reacting with oxygen in the air. Benzoic acid, And its salt (Benzoate), sorbic acid (Sorbic Acid) and its salt (Sorbate) or paraben (Paraben).

The antiseptic is a prerequisite that the addition of the preservative should not damage the product or the corresponding substance and should be considered in terms of toxicity, weakness, persistence and cost of use, but it may be harmful if the amount exceeds the standard. have. Accordingly, the preservative may be included in an amount of 0.5 to 2 parts by weight based on 100 parts by weight of the vegetable fat in the anti-freezing type asphalt admixture of the present invention.

pH adjusting agent

The pH adjuster (or pH adjuster) is a component used to adjust the pH of the final product. The pH corresponds to a value indicating the degree of acidity or alkalinity of water, and specifically refers to an index of the concentration of hydrogen ion contained in water .

The pH adjuster may be divided into a pH adjuster for increasing the pH and a pH adjuster for lowering the pH. The pH adjuster of the present invention is a pH adjuster for adjusting the pH of the asphalt mixture, which is acidic as the viscosity- (Sodium hydroxide), potassium hydroxide (potassium hydroxide), arginine, or triethanolamine, which is suitable for adjusting the viscosity of the aqueous medium to be weakly alkaline.

If necessary, acidic substances such as hydrochloric acid, acetic acid, nitric acid, sulfuric acid, formic acid, and acrylic acid may be used. However, in the present invention, a pH adjuster is required to increase the pH of the asphalt mixture. Thus, It is preferable not to use it.

The pH adjuster may be included in an amount of 1 to 5 parts by weight based on 100 parts by weight of the vegetable fat in the antifreezing asphalt mixture adhesion preventive agent of the present invention. If the content of the pH adjuster is less than 1 part by weight, The viscosity becomes insufficient. On the other hand, if the amount exceeds 5 parts by weight, the pH increases to 9.0 or more and the viscosity increases excessively, resulting in deteriorated workability.

Freezing point control agent

The freezing point of the solution is lower than the pure solvent. This is because the vapor pressure of the solution is lower than that of the pure solvent. As the concentration of the solution increases, the triple point of the solution decreases and the freezing point becomes lower by lowering the equilibrium temperature of the solid and the liquid.

The water used in the present invention acts as a solvent for dispersing vegetable fat and a water-soluble copolymer in an anti-adherent agent. Since the freezing point of the water is 0 ° C, the water is frozen at a temperature below the freezing point, have.

Accordingly, the freezing point controlling agent of the present invention corresponds to a composition used to prevent the antifouling agent from freezing together with water at a temperature of 0 ° C or lower.

In other words, the freezing point controlling agent utilizes freezing point depressurization, in which only a solvent molecule coagulates when a specific substance is frozen and a solute molecule has a freezing point lower than that of a pure solvent according to a feature that interferes with the solute molecule. Alcohol is effective in freezing water.

However, it is difficult to use salt because it has a problem of corroding metal if it is used continuously when the chart surface is metal. Therefore, propylene glycol (propylene glycol) among polyhydric alcohols and ethyl alcohol, Or ethylene glycol (Ethylene Glycol).

The mixing ratio of propylene glycol or ethylene glycol to ethyl alcohol can be selectively used in the range of 1: 1 to 1: 2, and since ethylene glycol has about 10 times the toxicity of propylene glycol, a more environmentally friendly asphalt mixture It is more preferable to use propylene glycol as an anti-adhesion agent.

Optionally, the freezing point controlling agent may be selected from the group consisting of alcohol itself, glycol ether, polyol, polyether polyol or a mixture thereof or glycerol (or 1,2,3-propanetriol (Propanetriol)) may also be used.

In the anti-freezing agent for anti-freeze type asphalt mixture of the present invention, the freezing point controlling agent may be contained in an amount of 100 to 500 parts by weight based on 100 parts by weight of vegetable fat.

water

The water acts as a solvent for a dispersant of vegetable fat and a water-soluble copolymer which is a viscosity controlling agent. It can use ground water or water at room temperature. In the antifreezing agent for preventing asphalt mixture of the present invention, 100 parts by weight of vegetable fat And may be included in the range of 300 to 1400 parts by weight.

If the content of water exceeds 1400 parts by weight, the adhesion preventive performance of the asphalt mixture deteriorates. On the other hand, if the amount of water is less than 300 parts by weight, the emulsified form is changed from oil in water type to water in oil type ), Which dissolves the asphalt contained in the asphalt mixture.

The anti-freeze type anti-freeze asphalt mixture according to the present invention having the above-

A mixture producing step of dispersing a viscosity controlling agent in vegetable fat to produce a mixture;

An emulsifying water producing step of emulsifying the emulsifying agent and the preservative in water to produce emulsified water;

An emulsifying step of adding and mixing the mixture to the emulsified water to emulsify the vegetable fat in the emulsified water and to disperse the viscosity regulator dispersed in the vegetable fat to produce an emulsion;

A mixing step of mixing a freezing point controlling agent into the emulsion; And

Adjusting the viscosity by mixing the pH adjusting agent after the mixing step; ≪ / RTI >

Particularly, in the emulsifying step, the emulsion water produced in the emulsifying water producing step is stirred to such an extent that a vortex is formed, and the mixture produced in the mixing producing step is slowly mixed therewith to emulsify the vegetable fat, The copolymer is dissolved in water.

The above-mentioned mixture producing step, emulsifying water producing step and mixing step can all be carried out by using a known mixing apparatus commonly used in the art.

Hereinafter, the present invention will be described in more detail with reference to specific examples.

< Examples> Freezing  Preparation of anti-adhesion agent for asphalt mixture

Stage 1. To 100 parts by weight of refined soybean oil (vegetable fat) having a specific gravity of 0.918 and an acid value of 0.043, 2 parts by weight of a water-soluble copolymer (viscosity control agent) was mixed with stirring for 1 hour to form a vortex to prepare a mixture of soybean oil and water-soluble copolymer.

Here, the water-soluble copolymer shows an acidity of pH 2.9 when 0.5 wt% is dissolved in water. When the aqueous solution is dissolved in water at 1 wt%, the viscosity is 48,000 mPas when the pH is adjusted to 6.5 using sodium hydroxide .

Step 2. Emulsifier and preservative are dissolved in water to produce emulsified water. The water was 630 parts by weight based on 100 parts by weight of the refined soybean oil, 2 parts by weight of isopropylamine-dodecylbenzenesulfonate, which is an alkylbenzenesulfonate surfactant, and sodium benzoate Benzoate) are mixed.

Step 3. The emulsified water prepared in step 2 is stirred at room temperature while slowly adding the soybean oil and the aqueous copolymer solution prepared in step 1, and then mixed for 24 hours to completely emulsify the emulsified water to prepare a weakly acidic emulsion.

Step 4. To the emulsion prepared in step 3, 260 parts by weight of a freezing point controlling agent consisting of ethyl alcohol and propylene glycol in a ratio of 1: 1 was slowly added thereto, followed by thorough stirring, and then mixed with a pH adjusting agent to prepare an asphalt mixture adhesion preventive agent. As the pH adjuster, triethanolamine (2.5 parts by weight) is used, and as a result, the viscosity of the resulting anti-freezing asphalt mixture adhesion preventive agent is 300 to 500 cPs.

& Lt; Comparative Example & gt; Preparation of anti-adhesion agent for asphalt mixture ( Korean Patent No. 1635457)

Stage 1. 10.0% by weight of refined soybean oil having a specific gravity of 0.918 and an acid value of 0.043 and 0.25% by weight of a water-soluble copolymer were mixed for 1 hour while stirring to form a vortex to prepare a mixture of soybean oil and a water-soluble copolymer.

Wherein the water-soluble copolymer exhibits an acidity of pH of 3.2 when dissolved in water in an amount of 0.5% by weight and has a viscosity of 53,000 mPas when the aqueous solution is adjusted to pH 6.0 with sodium hydroxide after dissolving in 1% by weight of water .

Step 2. Emulsifier and preservative are dissolved in water to produce emulsified water. Here, the water is mixed with 89.05% by weight, the preservative is 0.25% by weight of sodium alphaolefin sulphonate, which is a surfactant of alpha olefinsulfonate series, and 0.2% by weight of sodium benzoate preservative.

Step 3. The emulsified water prepared in step 2 was stirred at room temperature while slowly adding the soybean oil and the aqueous copolymer solution prepared in step 1 and mixed for 24 hours to completely emulsify the emulsion to prepare a weakly acidic emulsion. Thereby preparing an asphalt mixture adhesion preventive agent.

As the pH adjuster, triethanolamine is used in an amount of 0.25% by weight, and the viscosity of the resulting asphalt mixture adhesion preventive agent is 300 to 600 cPs.

The comparative evaluation results of the asphalt mixture adhesion preventive agent prepared according to the examples and comparative examples of the present invention and the comparative evaluation results of the soybean oil and the petroleum anti-adhesion agent, which are conventionally used, .

Since the method of performance evaluation has not yet been developed in Korea, the evaluation method of the Texas Department of Transportation (USA) was modified according to the domestic situation. In the low temperature freezing test, about 600 g The sample was collected, sealed, and observed in a low-temperature chamber at -15 ° C for 1 hour, 3 hours, and 5 hours.

(1) Performance test

In the performance test, the asphalt peeling test, the asphalt mixture sliding test and the asphalt adhesion test were conducted on Examples and Comparative Examples, soybean and light oil according to the present invention.

The asphalt peel test is a test to measure the phenomenon that the asphalt in the mixture is melted and peeled off from the aggregate by the asphalt mixture adhesion preventive agent. The asphalt mixture sliding test is a test in which the mixture placed on the bottom of the carrier vehicle slips down It is a test to measure the level of the surface of the vehicle.

In addition, the asphalt adhesion test is performed when the recycled asphalt mixture is recycled and the heated recycled aggregate is weighed in a weighing trolley, and the asphalt is different in the construction equipment such as the input facilities, the floor of the conveying vehicle, It is a test to simulate the phenomenon of sticking.

The test method is based on Tex-239-F test method of Texas Transportation Bureau, and the results of each test are as follows.

(1-1) Asphalt peeling test

Asphalt peeling test result Test material Test result Asphalt concrete Asphalt adhesion preventive agent General asphalt mixture Example No peeling Comparative Example No peeling Soybean oil Normal peeling occurrence Diesel Serious peeling occurs Modified asphalt mixture Example 1 No peeling Example 2 No peeling Soybean oil Normal peeling occurrence Diesel Serious peeling occurs

As shown in Table 1, the peeling of the asphalt mixture did not occur even after 7 days in the examples of the present invention and the comparative example (the mixing ratio of Korean patent No. 1635457) in both the general asphalt mixture and the modified asphalt mixture. However, in the case of soybean oil, ordinary peeling occurred, and in the case of light oil, serious peeling occurred.

More specifically, in the case of soybean oil, peeling began to take place 10 minutes after the start of the test (when the asphalt mixture was immersed in soybean oil), and in the case of light oil, 1 hour after the start of the test It was found that the peeling progressed considerably. Also, when the asphalt mixture particles after 7 days passed in the antifouling agent were observed, fine antifouling agent particles of the antifouling agent of the examples and comparative examples still adhered to it. In case of soybean oil, the fine aggregate was mostly peeled off, but the asphalt which had been coated with coarse aggregate remained attached In the case of diesel oil, not only the fine aggregate particles were mostly separated, but also the asphalt covering the coarse aggregate was mostly peeled off and the aggregate surface was exposed.

As a result, when the asphalt peeling test results are examined, it can be seen that the antifouling agent according to the present invention does not cause asphalt peeling compared to light oil and soybean oil.

(1-2) Asphalt mixture sliding test

The sliding test of the asphalt mixture is the adhesion of the asphalt mixture preventive agent used to prevent the asphalt mixture from adhering to the floor of the production equipment, the floor of the transportation vehicle and the installation equipment during the production, transportation and installation of the asphalt mixture due to the adhesion property of the asphalt mixture. The test results are shown in Table 2, which shows the test results and the spraying period of the asphalt mixture adhesion preventive agent.

Sliding test result of asphalt mixture division General asphalt mixture Modified asphalt mixture Example Comparative Example Soybean oil Diesel Example Comparative Example Soybean oil Diesel The metal plate (g) 980.5 983.2 978.6 981.3 981.3 980.5 983.2 978.6 Sprayed anti-adhesion agent (g) 40.5 41.3 10.4 6.3 40.2 40.3 10.5 7.1 The primary mixture (g) 499.8 501.2 500.3 498.9 500.3 502.3 503.1 500.4 Metal plate after primary sliding (g) 984.3 986.1 986.4 983.6 984.8 983.1 989.1 983.3 The second mixture (g) 500.8 502.1 499.0 498.0 499.3 499.4 500.9 500.6 Metal plate after secondary sliding (g) 983.9 985.7 981.7 982.8 984.1 982.6 985.6 981.8 The third mixture (g) 498.2 501.6 500.4 502.8 501.6 498.5 497.9 502.6 Metal plate after third sliding (g) 983.4 985.1 979.3 981.9 983.6 981.8 984.1 979.8

As shown in Table 2, it was found that sliding of the asphalt mixture three times with one time spraying of both the general asphalt mixture and modified asphalt mixture in the examples and comparative examples of the asphalt mixture adhesion preventive agent, soybean oil, . Therefore, all of the antifouling agents of Examples, Comparative Examples, soybean oil and light oil are considered to be able to fulfill their role as a lubricant between the production equipment and the floor of the vehicle and the asphalt mixture.

On the other hand, when the asphalt binder on the metal plate after the asphalt mixture sliding test was completed, the examples and the comparative examples performed well as a lubricant between the metal plate and the asphalt mixture, and there was almost no asphalt after the test.

On the other hand, in case of using soybean oil and light oil, there was no problem in the sliding test in total of 3 times, but when the metal plate was examined after the test, the asphalt was partially on the metal plate. It can be seen that Especially, diesel has a large amount of asphalt on the metal plate.

(1-3) Asphalt adhesion test

The asphalt adhesion test is a test to simulate the phenomenon that the asphalt mixture adheres to construction equipment, production facilities, etc. The results of the asphalt adhesion test are shown in Table 3.

Asphalt adhesion test results division Plain asphalt Modified asphalt Example Comparative Example Soybean oil Diesel Example Comparative Example Soybean oil Diesel The metal plate (g) 983.2 980.5 978.6 981.3 978.6 980.5 983.2 981.3 Sprayed anti-adhesion agent (g) 15.2 15.1 14.8 10.4 15.8 15.4 15.1 12.6 Primary asphalt (g) 20.3 20.1 20.8 19.8 20.4 21.3 20.8 20.6 Plate after first peeling (g) 993.7 990.6 987.8 failure 989.4 990.1 992.1 987.6 Secondary asphalt (g) 20.8 19.9 20.4 x 19.8 20.1 20.4 20.6 Metal plate after secondary peeling (g) 991.4 989.4 failure x 987.1 988.5 989.3 985.1 Tertiary asphalt (g) 19.7 20.3 x x 20.5 20.1 19.9 20.3 Metal plate after third peeling (g) 987.3 986.4 x x 984.1 986.0 984.2 982.6

As shown in Table 3, asphalt admixture preventive agents of the examples and comparative examples of ordinary asphalt were able to pour and peel three times asphalt after application of the antifouling agent once.

However, in the case of using soybean oil, in the second experiment, in case of using light oil, the first experiment failed to peel the asphalt from the metal plate. This shows that the antifouling agent for asphalt mixture of Examples and Comparative Examples has superior asphalt adhesion performance as compared with soybean oil and light oil which are widely used.

2. Low temperature freezing test

The low temperature freezing test is used to simulate the phenomenon of freezing at the storage facility of the anti-adhesion agent or the piping of the spraying facility at low temperatures such as in the winter or at night. After collecting about 600g of sample in a 1L metal container, 10, and -15 ℃, respectively, for 1 hour, 3 hours, and 5 hours, respectively. The test results of the low temperature freezing test are shown in Table 4.

division Example Comparative Example Soybean oil Diesel -5 ℃ After 1 hour clear freezing Partial gelation clear After 3 hours clear freezing Gelling clear After 5 hours clear freezing Gelling clear -10 ° C After 1 hour clear freezing Gelling clear After 3 hours clear freezing Gelling clear After 5 hours clear freezing Gelling clear -15 ℃ After 1 hour clear freezing Gelling clear After 3 hours clear freezing Gelling clear After 5 hours clear freezing Gelling clear

As shown in Table 4, the antifouling agent for the asphalt mixture of Comparative Example was frozen when left at a temperature of -5 ° C or less for 1 hour or more, and when the soybean oil was used, it was gelled as a whole.

Only results in the case of using the light oil and in the case of the antifouling agent for asphalt mixture of Examples were found to be no abnormality as a result of the low temperature freezing test.

As shown in the above tests, the antifouling agent for asphalt admixture according to the present invention can be used in the production and installation of asphalt admixture, so that the asphalt admixture can be added to the floor of the production facility, the transportation vehicle and the construction equipment without affecting the physical properties of the asphalt mixture. It is possible to prevent deterioration of the performance of the asphalt mixture and to provide an environmentally friendly asphalt mixture production and construction environment since it is a water-soluble emulsion-state anti-adhesion agent.

As a result, the antifouling agent for asphalt mixture according to the present invention has an excellent antifouling performance and is freeze-free even in the winter or the winter when the temperature is low, so that it can be used regardless of the surrounding environment.

In addition, the antifouling agent for asphalt mixture according to the present invention can prevent the aging of the rubber to be contacted, and can also reduce environment pollution and improve the working environment by using environmentally friendly, low-toxicity materials.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made without departing from the essential characteristics of the present invention by those skilled in the art. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims (6)

Based on 100 parts by weight of vegetable fat having an acid value of 0.043 and a specific gravity of 0.918, 630 parts by weight of water; 2 parts by weight of emulsifier; 2.5 parts by weight of a pH adjusting agent; 2 parts by weight of a viscosity modifier which changes viscosity according to pH; 1 part by weight of preservative; And 260 parts by weight of a freezing point controlling agent capable of lowering the freezing point of the water; Respectively,
The vegetable fat corresponds to refined soybean oil,
The emulsifier is isopropylamine-dodecylbenzenesulfonate, which is a surfactant,
The pH adjusting agent is triethanolamine,
The viscosity controlling agent is a water-soluble copolymer in which acrylic acid and polyalkenyl polyether are cross-linked,
The preservative is sodium benzoate,
Wherein the freezing point controlling agent is any one selected from the group consisting of propylene glycol or ethylene glycol and ethyl alcohol in a ratio of 1: 1 to 1: 2. Mixture adhesion inhibitor.
delete delete delete delete A method for producing an anti-freezing type asphalt mixture according to claim 1,
A mixture producing step of dispersing a viscosity controlling agent in vegetable fat to produce a mixture;
An emulsifying water producing step of emulsifying the emulsifying agent and the preservative in water to produce emulsified water;
An emulsifying step of adding and mixing the mixture to the emulsified water to emulsify the vegetable fat in the emulsified water and to disperse the viscosity regulator dispersed in the vegetable fat to produce an emulsion;
A mixing step of mixing a freezing point controlling agent into the emulsion; And
Adjusting the viscosity by mixing the pH adjusting agent after the mixing step; Of the asphalt mixture.

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